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Related Experiment Videos

Cervico-ocular function in patients with spasmodic torticollis.

R Stell1, M Gresty, T Metcalfe

  • 1Institute of Neurology, National Hospital, London, United Kingdom.

Journal of Neurology, Neurosurgery, and Psychiatry
|January 1, 1991
PubMed
Summary

Spasmodic torticollis (ST) patients showed absent cervico-ocular reflexes (COR). Vestibulo-ocular reflex (VOR) asymmetry in ST is not due to abnormal cervical input, despite similar VOR gain between groups.

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Area of Science:

  • Neurology
  • Ophthalmology
  • Vestibular System Research

Background:

  • Spasmodic torticollis (ST) is a neurological disorder characterized by involuntary neck muscle contractions.
  • The vestibulo-ocular reflex (VOR) and cervico-ocular reflex (COR) are crucial for maintaining gaze stability.
  • Understanding the interplay between cervical input and vestibular function in ST is important for diagnosis and treatment.

Purpose of the Study:

  • To investigate the cervico-ocular (COR) and vestibulo-ocular reflexes (VOR) in patients with spasmodic torticollis (ST).
  • To determine if abnormal cervical input contributes to VOR asymmetry observed in ST patients.

Main Methods:

  • Measured active and passive VOR and COR in seven ST patients and six healthy controls.
  • Assessed cervico-vestibular interaction during active head rotation.

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Main Results:

  • COR was weak or absent in both ST patients and controls.
  • VOR gain was similar between groups, but five ST patients exhibited significant VOR asymmetry.
  • No abnormal cervico-vestibular interaction was detected during active head rotation in ST patients.

Conclusions:

  • The findings suggest that VOR asymmetry in ST is not explained by abnormal cervical input.
  • COR dysfunction may be a feature in ST, but its relationship to VOR asymmetry requires further investigation.